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colour-schemes

Comprehensive guide to colour selection in data visualisation with d3.js.

  • Skills
  • Creative design
  • 2

What it does and how to use it

A skill that teaches Claude Code to do creative design tasks well. It is packaged knowledge the model uses whenever it is relevant.

  1. Install the skill (command above).
  2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
  3. No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/colour-schemes && curl -fsSL https://doutorai.pt/data/lib/skills__colour-schemes.md -o .claude/skills/colour-schemes/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# D3.js Colour Schemes and Palette Recommendations

Comprehensive guide to colour selection in data visualisation with d3.js.

## Built-in categorical colour schemes

### Category10 (default)

```javascript
d3.schemeCategory10
// ['#1f77b4', '#ff7f0e', '#2ca02c', '#d62728', '#9467bd',
//  '#8c564b', '#e377c2', '#7f7f7f', '#bcbd22', '#17becf']
```

**Characteristics:**
- 10 distinct colours
- Good colour-blind accessibility
- Default choice for most categorical data
- Balanced saturation and brightness

**Use cases:** General purpose categorical encoding, legend items, multiple data series

###

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